Helmet looks really nice in-game and I would give you 5 stars but I can not use the helmet the way you uploaded it here. It replaces a helmet that you can only get if you buy the Legend Edition of F1 2019. That means everyone who has not got the Legends DLC can not use this helmet.
About a couple of months ago, I requested the Gran Turismo Sport overlay in the request section somewhere on the forums of racedepartment. I logged in today, to finally see this amazing overlay published to the site. Good work so far, I'm really looking forward to seeing future updates of this! <3